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This Concept Map, created with IHMC CmapTools, has information related to: Urinary system, Loop of Henle ascends back up to the renal cortex and becomes the DCT, PCT takes up compounds body doesn't need like creatinine by receiving peritubular cells' Secretion, Loop of Henle descending and thin ascending limb solely permeable to Water, PCT which descends into renal cortex and becomes Loop of Henle, Sodium and other ions, which are pumped out to reinforce the osmolality gradient by Active Transport, Collecting Duct which, when the body is dehydrated, reabsorbs large quantities of water and produces concentrated urine using Aquaporins, Blood Pressure when low, granules of JG cells release Renin, Loop of Henle thick ascending limb solely permeable to Sodium, Nephron uses narrow capillaries and smooth muscle to maintain a constant, high Blood Pressure, Glomerulus in renal corpuscle of Nephron, Water which enters interstitial space and eventually the vasa recta along its osmolality gradient via Passive Transport, DCT is final site of water and ion reabsorption before merging with the Collecting Duct, Renin which raises systemic blood pressure by coupling with Angiotensin II, PCT which is the major site of water and nutrient Reabsorption, Active Transport After which, the osmolality gradient is restored by Chloride, Filtration after which, the filtrate passes from Bowman's capsule into PCT, Blood Pressure which is necessary to force water and ions out of blood into Bowman's capsule, and undergo blood Filtration, Aquaporins in its membrane, inserted by the hypothalamic hormone ADH